Is there a way for kixtart to execute a command line without having to map a drive first just like in a winnt script?

If i use this it works:
shell "%comspec% /e:1024 /c r:\temp\scan32.exe"

But if i use this it doesn't:
shell "%comspec% /e:1024 /c \\servername\test\scan32.exe"

the first one works because i mapped the drive but i want to execute the file without having to map the drive. Is this possible in kixtart? If so, can you please tell me how? Thanks.