I have a simillar setup, a Dell inspiron 6000 with a 1.5G pentium m with 512
and shared vga. I will run, slow, but simillar to my first PC running XP a
Vaio 1.5G pentium 4 in 2001. For this Vista Ultimate you really need a
system with 1g to 2g ram, a graphics card with dedicated memory, very fast
harddrive access speed(those new hybrid flash drives come to mind), and a
dual core setup. But who has that change laying around. So for your question
yes it will work.