I wish to change our platform from Novell 5.1 to windows 2003 Terminal Server.
(Thin client)

Present Hardware
*--------------*
Pentium III Server 800 MHz 18 GB and around 100 Nodes mostly with
Windows 98 and XP having Novell Client.

Present Software
*--------------*
Mainly Cipper 5.2 Based DOS Applications linked with Exospace.
(16 Bit DOS applications) and MS office.
Modules include Purchase,Inventory,Sales,Marketting,Payroll,Accounts,
Office Automation softwares like letters, emails, mailings.. etc.
Approximately 10 lacs lines of codes (1 Million)
Approximately 100 users at a time each one having two applications
loaded at a time.

Problems faced on Test windows 2003 Terminal Server.
*--------------------------------------------------*
(Pentium VI Machine with 4 GB memory and 4 Thin Clients)
1) No of users could not go beyond 10. (Problem due to Keyboard Polling)
-> Solved by installing Tame DOS

2) When Processor oriented activities like Printing Ledger,generating MIS ..etc.
are given from 4 to 5 Nodes , CPU Utilization goes up to 100% and remains
there and feel like system halted.

During the test we found that memory utilizaion was less. (Each NTVDM used
around 4 to 5 MB space only)

Is it possible for a 100 users , 200 DOS applications run on a terminal server?
What is the best solution other than re-writing the applications?

Migrating Clipper to 32 Bit like Harbour,xBase++ didn't work because of
the lack of source code of libraries and the modifications required in clipper
code.