ENGLISH version:
Help text for uploading of Z....PRI (and codepage S....CPA if applicable)
from files into R/3:

Uploading Zxxxyyyy.PRI:
Use SE38 transaction in R/3 to execute report RSTXSCRP. Enter parameters:

Select radiobutton "device type"
Object name: Zxxxyyyy  (this is the name of the device type)
Mode:        IMPORT
Select radiobutton "File system: GUI"
(All other parameters with default values)
Execute report. Later, a popup window will appear, prompting you to
select the Z.....PRI file on the PC.

Uploading Szzzz.CPA:
Use SE38 in R/3 to execute report RSTXCPAG. Enter parameters:
Codepage: zzzz
Dataset name: <path and filename, e.g. /tmp/Szzzz.CPA>

Download: <space character>
Upload: X
Update/Delete: X
execute report!

Now you will have a new printer definition (device type) Zxxxyyyy in 
transaction SPAD and a new codepage zzzz, if necessary.

Should you encounter message "Format SP6A is unknown and will be ignored" when
uploading a file with RSTXSCRP, you can safely ignore it. This message refers
to data included for 4.0 systems which is ignored when importing into
older systems.