how to resize my partition while vista says it has no space but there's space enough

I have a partiotn with vista ultimae on it, it's aroun1,3 TB big.
It still has around 700 GB free space.
I already reduced the virtiual memory size to 200 mb to make sure that
windows finds space but no..
It keeps on saying there is 0 space to use (and then suggest to have a look
at the virtual memory or at the moment'recordings'(i think with that is
meant systemreplacement, the replacepoints.
Should i remove those systemreplacepoints and where i they located?
And what about this: i just read that systemreplacement ony works with a
disk of at leas 1 GB, is that true?

Thanks for all your help,

Jerry