Well, sounds like your "root=" section is incorrect.
I have no idea what it should point to, the best place to ask would be in the Slax forums (if there are any). If it were a standard Linux setup this would be far easier, but I'm utterly perplexed as to what hd** value you would give for a FOLDER in a drive....... :S
If you point any Slax expert to this thread, they should quickly be able to see what EasyBCD is trying to do and give you the right info for the "kernel....." line.
Good luck with that, and please post back if/when you get that figured out.