I installed TMS Component Pack 7.5.4.0 on a Win7 PC having D2010, XE6 and XE7. The D2010 had an older version of TMS Component Pack. At the beginning of the install of the newer TMS It announced it had detected an older TMS Pack and it had to first be removed. I did not want t install this new TMS into D2010. I was worried for a while. I said No to the uninstall and went further. Then the installed detected what versions of Delphi I had installed and allowed me to select which Delphi to install to.... A suggestion is to alter this preamble to installation .
I'm not sure I understand what exact alterations you'd expect to the installer?