well I wanted absolutely nice SEO friendly URLs, so here comes the half-baked solution
The first 2 point to index.php and show points to ... image.php
The breadcrumbs do not yet work, but lytebox works.
then add this in the config (could also add it into .htaccess, but I added it in the main site config)
AllowEncodedSlashes On
# anti rewrite the urls to path
# using mod_substitute
<LocationMatch /(album|image)>
AddOutputFilterByType SUBSTITUTE text/html
# href="http://example.com/image.php?twg_album=abc&twg_show=A.jpg">
# href="/show/abc/A.jpg"
Substitute s,href=(['"])(http://[^/]*)?/[^>]*image.php\?twg_album=([^&]*)&twg_show=([^"]*['"]),href=$1$2/show/$3/$4,
#<a href="http://example.com/alXbum/aXbc?twg_album=abc&twg_show=A.jpg">
#<a href="http://example.com/image/abc/A.jpg">
Substitute s,href="([^:]*)://([^/]*)/.*\?twg_album=([^&]*)&twg_show=([^"]*)",href="$1://$2/image/$3/$4",
#<a href="/alXbum/aXbc?twg_album=abc&twg_show=A.jpg">
#<a href="/image/abc/A.jpg">
Substitute s,href=(["'])/[^>]*\?twg_album=([^&]*)&twg_show=([^"]*["']),href=$1/image/$2/$3,
# root all relative URLs to top site URL (that's not compatible with TWG in subdir but works for me)
Substitute s,src=(["'])([^/]),src=$1/$2,
# don't do it for http: at the beginning. yes, ugly... who cares?
Substitute s,href=(["'])([^/h][^t][^t][^p][^:]),href=$1/$2,
# for /dtree/dtree-min.js but still not perfect
Substitute s,\+'buttons,\+'/buttons,
</LocationMatch>
#RewriteCond %{QUERY_STRING} ^twg_album=(.*)&twg_show=(.*)$
#RewriteRule .* /image/%1/%2? [R,L]
#RewriteCond %{QUERY_STRING} ^twg_album=(.*)$
#RewriteRule .* /album/%1? [R,L]
# Do not do anything for already existing files and folders
RewriteCond /home/george/Limbermen/%{REQUEST_FILENAME} -f [OR]
RewriteCond /home/george/Limbermen/%{REQUEST_FILENAME} -d
RewriteRule (.*) - [L]
RewriteRule ^/album/(.*)$ /index.php?twg_album=$1 [L]
RewriteRule ^/image/(.*)/(.*)$ /index.php?twg_album=$1&twg_show=$2 [L]
RewriteRule ^/show/(.*)/(.*)$ /image.php?twg_album=$1&twg_show=$2 [L]
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