Loadlin needs a number of parameters, and so it is easier to put them into a 1 line batch file and run that instead
Firstly a few questions.
Do you know which partition you installed Linux onto? (/dev/hda2?)
Do you have a copy of the kernel file itself? (vmlinuz?)
Do you have a copy of the initrd file?
If you answered yes to all of the above, then you can use loadlin like this:
C:\LOADLIN> loadlin kernel /dev/partition initrd=initrdfile
Obviously substituting the kernel
with your vmlinuz file, the partition
with the appropriate partition, and the initrdfile
with your initrd.gz file. With those in place, you should then boot into your Linux system.