Re: Are there any recommendations for installation of components of SAP GUI?

It depends on what your customers need. As you describe it, it sounds like "SAP GUI for Windows Component" should do it for you. You can download the SAP GUI here:

http://www.service.sap.com/~form/handler?_APP=00200682500000001943&_EVENT=DISPHIER&HEADER=N&FUNCTIONBAR=N&EVENT=TREE&TMPL=01200615320200019595&V=INST

The latest patchlevel can be downloaded here:

https://websmp202.sap-ag.de/~form/handler?_APP=00200682500000001943&_EVENT=DISPHIER&HEADER=Y&FUNCTIONBAR=N&EVENT=TREE&NE=NAVIGATE&ENR=01200615320200019595&V=MAINT

A guide for the installation process is available here:

http://scn.sap.com/docs/DOC-30247

Hope this helps,

Jann