Yesterday we implemented it across the board and have had loads of drive mapping problems.
We have a single domain system with 1 PDC and 3 BDCs.
All netlogon directories are identical with KIX 3.62 installed. KIX RPC is running on all servers.
There are 120ish W95 w/s. When we did the pilot we ran all kix stuff from the netlogon directory. Would it make things better if I copy all W95 kix files to each workstation.

It appears that it was mainly the least busy server which did not map drives. The w/s logged in ok but there were no drives mapped. we used to get problems with this machine only logging in people as guest with Kix 3.53 but upgrading to 3.62 seems to have cured this.
I am now kind of committed down the Kixtart route and would welcome any suggestions.