It really depends on how u have installed linux on ur system, if you use GRUB or LILO.
There are two scenarios that can happen when you delete your Suse partition.
1) You delete the partition, restart, boot normally into windows.
2) You delete the partition, restart and windows won't boot becoz u screwed ur MBR.
Scenario 2 is not as bad as it sounds as there is a fix for this, but u need the WinXp Disc and the administrator password.
I actually tried this with my system. I had win 2k on one partition and Red Hat on the other. I just deleted the Red Hat partition thinking it wouldn't make any difference. When i deleted the Red Hat partition my computer wouldn't boot at all, but it took 5 mins to fix it.
If you delete your Suse partition and in the process screw ur MBR just
boot from ur WinXp disc,
choose to repair an existing WinXp installation,
go to the repair console,
enter the admintrator username and password,
type help to display a list of files you can run,
run fixboot.exe,
run fixmbr.exe,
quit the console,
restart.
and you should boot into windows normally.
luckyrocker