I haven't had any luck with it on vB4 so I have stay with 3.8.
If you have any success please let us know.
lcp03o: here is a copy of what I add to classcore & have no problems with sharing the stuff I need, that being the users info only, so the threads & posts etc are unique.
Code:
$shared_tables = Array("user","useractivation","userban","usertitle","userchangelog","usertextfield","userfield","usergroup","userlist","usernote","profilevisitor","reputation","reputationlevel","spamlog","strikes","pm","pmreceipt","pmtext","avatar","customavatar","profilefield");
$main_prefix = "";
foreach ($shared_tables as $shared_table)
{
$orig = TABLE_PREFIX.$shared_table;
$dst = $main_prefix.$shared_table;
$this->sql = str_replace($orig." ",$dst." " ,$this->sql);
$this->sql = str_replace($orig.".",$dst."." ,$this->sql);
$this->sql = str_replace($orig."\r",$dst."\r",$this->sql);
$this->sql = str_replace($orig."\n",$dst."\n",$this->sql);
$this->sql = str_replace($orig."\t",$dst."\t",$this->sql);
}