Netscreen to Cisco client/server VPN?

Hi folks,

I'm currently slogging through the archives but I'm hoping someone 
has a quick answer for me.  I've got a road warrior type user who 
needs to connect (not simultaneously) from a Win2K laptop to both a 
Cisco (3000 I believe) and NetScreen (5XP running the 4.x firmware) 
VPN server.  He currently has the Cisco VPN client installed.  Since 
the Cisco VPN Dialer and NetScreen Remote clients don't seem to play 
nicely with each other when they're both installed I'm wondering if 
anyone has had any success using either client (Cisco or NetScreen 
Remote) to connect to both server types and if so if you have a 
recipe or config examples to share.  I see lots of interoperability 
testing for VPN server-to-server connections but I'm not finding any 
relevant information about client-to-server interoperability.  Any 
help, including, "It can't be done, you bonehead," would be 
appreciated.

Regards,

Jim Dueltgen
LMi.net