There is the possibility to install the TSX RemoteApp client in a command prompt, script, ...

At first you have to download the TSX RemoteApp installer for the client from here:
32-Bit: http://www.thinstuff.com/releases/ThinstuffTsxRdcClient-x86-latest.msi
64-Bit: http://www.thinstuff.com/releases/ThinstuffTsxRdcClient-x64-latest.msi

Then open a command prompt, change to the folder which contains the TSX RDC Client and use the command "msiexec" to install the .msi file.

e.g msiexec  /i \\Server\Folder\ThinstuffTSXRDCClient-x64-1.0.701-EN.msi

You can also hide the gui for the installation with the following:
e.g msiexec  /qn /i \\Server\Folder\ThinstuffTSXRDCClient-x64-1.0.701-EN.msi 

All available parameters:

e.g msiexec /h

With this you will able to setup a script for installing the client side application of TSX RemoteApp!

Additional links:

FAQ -> TSX RemoteApp

FAQ -> TS RemoteApp vs. TSX RemoteApp