Local lan access with cisco 3.5.2 vpn client

Hello,

I have been having problems accessing the local lan with the cisco vpn
client after connecting. I have enabled local lan access (which I can
verify by pinging the internet directly). The problem is that the
company which I am connecting to have specified that 10.0.0.0/17 as
their netmask (large company, multiple sites). My personal network is
10.0.0.0/24, 10.0.1.0/24 and 10.0.2.0/24. These blocks are unused at
the local (in fact all 10.0.x.x are unused (they start at something
like 10.10.0.0 and up).

I therefore cannot ping any local machine on my local net because I
thinks these are remote. Is there as way to append to the local lan
routes for the cisco client after the connection has been made?

I have already asked that the add these to the cisco unit and they
said since it's not broke for them they won't fix it (which makes
sense of course).

Can this override be done? Split tunnel is enabled.

TIA,

Gary Smith