Hello, Bernd.

>is there a simple possibility to change (not permanently) the
>constellation names between the latin 3-character abbreviation and the
>fully written german translation within Guide maps (copying and
>renaming an file would be ok, like in HORIZON.DAT).

You can create .tdf file to display your favorite constellation name
picking out from CD_DATA3.TDF.
Line number is 166 to 186.
Then Edit this line.
text 23 21
If you want to display (say) "LMi" as "Kleiner ...", edit it as below.
text 49 21

To use this feature, you need to run Guide8 WITH CD-ROM.
But if you edit this line as below, you can run this WITHOUT CD-ROM.

----
file !:\text\constell.nam
file d !:\text\constell.nad
file c !:\text\constell.nac
file i !:\text\constell.nai
file s !:\text\constell.nas
----
Edit these line as below ( "!:" means CD drive letter )
----
file text\constell.nam
file d text\constell.nad
file c text\constell.nac
file i text\constell.nai
file s text\constell.nas
----

I hope you find satisfaction.

Masaki Kouda @Japan