What options (character set, length) does the program use in the preset default scenarios?

Scenarios in Accent*PR just a sets of attack. For RAR scenario file is:

No dictionary based attacks

NONE
/a:b /c:a /min:1 /max:3
/a:b /c:s /min:4 /max:4
/a:b /c:c /min:4 /max:4
/a:b /c:d /min:4 /max:5

Default for RAR 3.x
RAR3
/a:b /c:a /min:1 /max:2
/a:r /r:*1s.rul /d:*medium_en.dic
/a:r /r:*1a.rul /d:*medium_en.dic
/a:b /c:a /min:3 /max:3
/a:b /c:s /min:4 /max:4
/a:b /c:c /min:4 /max:4
/a:b /c:d /min:4 /max:5
/a:r /r:*2s.rul /d:*medium_en.dic /d:*small_en.dic

Rules and dictionary files are built-in into program.