I have WinME and Mandrake
After WinME has totaly gone out of control, I decided to install Win98SE and SuSE 7.4

How should I do that? Would this work:
1) format the linux-partitions with Partition Magic (here I m not quite sure WHAT and HOW exactly to format)
2) now I won't have LILO any more (I hope so) and WinME is going to start by default
3) making boot disc with some DOS ( which I'll use to ensure myself that I'll have CD-ROM when everything is empty)
4) removing WinME and installing Win98SE
5) installing SuSE and writing LILO-file by hand

thanks!

It's quite good. I'm not sure if it's a good idea to remove all Linux partitions. Maybe leave your /home ? You don't need PartitionMagic, you can use fdisk to remove all other partitions. You can remove the partitions or leave them untouched (when installing, SuSE will overwrite).
Use
lilo -u
to remove lilo (or from a DOS boot disk fdisk /mbr).

Good luck!

WHy reinstall Linux when only ME is gone out of control?
GOOD thing would be to reinstall ME without letting it format your
drive, and then just install LILO to multiboot.
However, BEST thing to do would be to let ME go altogether.