Or install to RAM and copy it to the destination manually, remembering to correct the paths in any changes it made to the startup files.
If installing to RAM:, make sure that you're Ram Disk isn't recognised as 100% full even when not. If it is, add this to your startup-sequence:
http://aminet.net/package/util/sys/PatchRAM...so that it lists correct free space on the Ram Disk.
Alternatively, you could mount a virtual HDF device large enough for your software install and install to there... then move things back across to your main partition afterwards. I prefer to install things manually though.
Not sure about Amos, but if you make a copy of your Amos disk, maybe you could modify that copy to mount a CF drive (with compactflash.device and its mountlist, and with fat95) and then you could direct the install to CF0: assuming it does indeed request for you to type in a device or Volume Name to install to.