Welcome to the forum and Happy new year.
You have 2 problems I think;
1: 0079 and 0080 are already used in the 2008-2 map disc, use 0081 and 0082.
2: You have missed the htm reference files out (st_cameras.htm and sf_cameras.htm)
Please find a link with all you need (already modded) to mod your disc, (please note there is no camera db in the zip file), just rename and use yours.
a) Add (drag n drop) camera_splash.gif to the "\TPD\Icons" folder
b) Add (drag n drop) POI_CAMERA.PNG to the "\TPD\NCCBEUFNM_EU_20080610\ICONS\RR" folder.
c) Add (drag n drop) POI_CAMERA.PNG to the "\TPD\NCCBEUFNM_EU_20080610\ICONS\NAVIOX" folder.
d) Overwrite (drag n drop) the ENG.LSC file in the ""\TPD\NCCBEUFNM_EU_20080610\ENG" folder.
e) Add (drag n drop) 0081.idx to the "\TPD\NCCBEUFNM_EU_20080610\ENG\TABLES\0" folder.
f) Add (drag n drop) 0082 to the "\TPD\NCCBEUFNM_EU_20080610\ENG\TABLES\0" folder.
g) Add (drag n drop) SF_CAMERAS.HTM to the "\TPD\NCCBEUFNM_EU_20080610\ENG\SE" folder.
h) Add (drag n drop) ST_CAMERAS.HTM to the "\TPD\NCCBEUFNM_EU_20080610\ENG\SE" folder.
Here is the link to the zip file;
Clicky
HTH