You can store GuiXT scripts, images (gif, jpg) and InputScripts in the  "SAP MIME Repository", SAP transaction SE80. This has the following advantages:

• The MIME Repository supports the versioning of all files
• The files are stored in hierarchically organized folders
• There is a tool (ABAP program BSP_UPDATE_MIMEREPOS) for mass import and export from/to local folders.
• The file access can be done via http or WebDAV, in addition to the RFC (Remote Function Call) based access that is used by GuiXT.

Using the notation SAPMR: in the same way as SAPWR: you can specify files and folders in the SAP MIME Repository in GuiXT scripts and GuiXT profile. Examples:

// GuiXT Profile
Directory1     SAPMR:SAP/BC/BSP/SAP/GUIXT

//Script
Image (toolbar)    SAPMR:SAP/BC/BSP/SAP/GUIXT/ICONS/help.gif

Screenshot transaction SE80, SAP MIME Repository:

Please see this tutorial for further details (by courtesy of the author, Freddie Botha).