network - routing to other subnet - HOWTO?

[Lexje]

Hi folks,

Situation:
LMCE default network config; external eth1 has fixed ip 192.168.100.101.
I have an existing network in the range 192.168.100.0
Switched off DHCP on my 192.168.100.0 network.
LMCE has DHCP running.

How do I route workstations connecting via LMCE to my existing network? (printers, shares)
Can I (manually) add shares to LMCE that are on my 192.168.100.0 subnet?

As I am in a testing stage, I'd prefer not to go changing all my existing network apparatus.
If I would adapt LMCE to use the same 192.168.100.0 subnet, will TFTP / PXE still work out of the box?
What settings need to be adjusted?

I join a network layout. (it seems uploading an attachment doesn't work?)

Thanks for you help!!

Erwin