Is there any way around this except to turn off UAC?
Not really, if it were possible (easy) to install software bypassing UAC, then there would be no point in having UAC. The whole idea behind UAC is to prevent unauthorized (read potentially dangerous) software from being installed.
If you use some of sort of network management software/service like SCCM, then that might be able to do it by having it's own software installation service installed.
Are you deploying this to all your workstations? If so you could set it to run under the local admin account which bypasses UAC as it's setup to run everything in admin mode by default (unless you've changed this via GPO).