poptop & linux 2.2.20

Hello, Wondering if anyone have successfully installed poptop on a 2.2 kernel. I'm trying to install poptop on suse 7.0 with a custom 2.2.20 kernel. I'm running into trouble upgradinng the ppp.o after compiling the pppd. I ran the make kernel and it tried to copy over the ppp and some ppp_mppe.c and header files. Afterwards I try make modules. But the ppp modules keeps returning an error and refuse to compile. Any help appriciated. thanks