Ah yes....I also have fond memories of doing an MS Small Business Server 4.5 install (based on NT 4) on a Compaq Proliant 6500 and getting 3/4 of the way into it only to find out there's a bug in the install.
For those not familiar...the install was a stringing together of each product's setup program passing install parameters along to try and automate the process.
Wow. What a pain in the ass.
Of course, by this time I've forgetten the exact error.
I just remember burning DAYS trying to get that F&CKING install to work.