It's a standard cabinate exe file, see my results here:
doctormo@delen~/Desktop/$ cabextract 28_PPTP.exe Extracting cabinet: 28_PPTP.exe extracting advpack.dll extracting w95inf16.dll extracting w95inf32.dll extracting cmstp.exe extracting 28p.inf extracting 28p.cmp extracting 28p.cms extracting Internet.ico extracting sv.txt
So it should be easy enough to make something which imports these exe files.
It's a standard cabinate exe file, see my results here:
doctormo@ delen~/ Desktop/ $ cabextract 28_PPTP.exe
Extracting cabinet: 28_PPTP.exe
extracting advpack.dll
extracting w95inf16.dll
extracting w95inf32.dll
extracting cmstp.exe
extracting 28p.inf
extracting 28p.cmp
extracting 28p.cms
extracting Internet.ico
extracting sv.txt
So it should be easy enough to make something which imports these exe files.