Shell "start" with value

[Michael]

Hello, 

Have run into something I just seem to not solve and asking if someone
may have an answer to this one.
I'm running the shell command for and environment add and need to add
the value with it, but of couse just get IPLOC=tIPadd.
tIPadd is the value of and ipaddress. 
Anyone know how I can get this in there, its WinXP so I'm using the
setx.exe file to get the environment add global.
 
get shell ("start" && location & "setx.exe IPLoc tIPadd")

Thanks for any help 
Michael