Ubuntu Installation :: 2nd Hard Drive Won't Boot (karmic Koala)?

i have 2 hard drives on my machine (1 with ubuntu & 1 with win xp) & would like to create a boot menu to select either at startup, but this isn't working. here is the order of how i setup my system:

1. installed win xp on drive1
2. disconnected drive 1 & installed ubuntu 9.10 on drive2
3. set ubuntu as master drive & win xp as slave drive

i've read about modifying menu.lst to get a boot menu, but as far as i can tell this is no longer valid in 9.10. i've also installed startup manager, which gives me a boot menu *but* when i select the win xp option at the boot menu, i get an error. i'm assuming this error is due to the fact that i am using 2 hard drives (instead of the more common 2 partition on 1 hard drive). Here is what my boot option says: Microsoft Windows XP Professional (on /dev/sdb1) Here is what commands run when I select this option:

drivemap -s (hd0) ${root}
chainloader +1
Here is the error that results:
ERROR: INVALID SIGNATURE

is it possible to get a boot menu with 2 hard drives using 9.10? it's worth mentioning that i am a brand new user to linux. p.s. the reason i didn't go for a partition on 1 hard drive from the start is that the ubuntu partitioner did not recognize any free space on my win xp drive.