I sense some frustration here, so I'll just respond to a few small comments rather than write another chapter.
you guys do not understand that the installation of multiple drivers at once, so that you can change the IO device during work, is one of the three core features of ASIO.
I think we understand it quite well, thank you. I even understand that you may have a number of different interfaces connected simultaneously either thru USB or with a belly full of PCI cards, personally, I don't. I have 12 channels of Delta I/O and that's 2 PCI cards right there which is clearly enough for me. I very seldom need or use more than the 8 in the Delta 1010. I
have gone to 11 or 12 IN recording a group but mama don't like that in da house, that's just me and I digress.
this is why it cant be that it does not work at all, even if that is your personal experience.
I was going to compose a witty response to this
non-sequitur , on the order of "Who are you going to believe, me or your lying eyes?" but I changed my mind. Really. I did. Even if you're seeing and reading this, I didn't write it. It simply can't be.
and gary´s prophecy that a computer will immediately crash when soundmanager ASIO is installed is pure nonsense, which is not getting better when you try to "explain" it to me. 
(though the explanation has yet to come)
I am pretty sure I didn't say that. I
did say that there can be situations where the Sound Manager ASIO will bump heads with a 3rd party one under some circumstances and that can, as with so many other Old-Mac OS conflicts, cause a hang that cannot be cured with less than a forced restart, the Command-Period move being ineffective.
soundmanger itself is also completely unreleated to the OPs problem with the delta.
That's actually almost certainly true.
and have you never had the need to run, say, cubase and sonicworx or maxmsp and peak at the same time and listen to it over the same speakers?
that is what ASIO is for: that you can use different interfaces at once.
Now I'm totally confused. I load and have open multiple apps like SVP and Sonicworx and Peak regularly. I can't remember needing to run them at the same time (simultaneously?) thru the same speakers, although I'm sure that if my Mac would actually enable me to do that, the result would be quite unusual for sure. I do switch back and forth at times from DAW to editor where SVP has the Delta 1010 and Peak has the Delta 44 OR Sound Manager. BUT, I don't do that often. I have a large console with lots of inputs and only the Deltas inside my Mac… no stack of external interfaces. But hey, everybody's workflow is different. It may be convenient for you that you
"can use different interfaces at once" but that's
not "what ASIO is for". ASIO exists to make high-quality audio handling possible by shortening the data path it has to unnecessarily travel and free up those clock cycles to do other things which vastly improves the overall timing - especially on PC's but it really benefits old Macs as well. I'm pretty sure you already know that and we're just having minor misunderstandings here.
I should tell you that ever since getting the modified-for-Sonnet Delta ASIO driver, they have happily lived in the ASIO folders snuggled up to the Sound Manager drivers without issue, just as they should. I must also insist however, that was NOT the case with the original M-Audio ones.
ssp3 also testifies to the ASIO oddities that are possible:My 2 cents..
There are several ASIO SoundManager drivers out there. I have two. One is from 1996, the other from 1997. On TiBook 667 SpectraFoo analyzer crashes with Error 10 with earlier one, but works fine with 1997 version, so it's worth re-checking what version you have in the ASIO folder.
That's why (if you read my last post, I'm leaning away from ASIO conflicts as the cause of all this and toward the "ASIO driver doesn't like the CPU upgrade" possibility. DieHard notes the 7455 doesn't "need" a firmware patch but theoretically, neither should my Sonnet 7450's.
And yet……
