How do you get custom items in a runescape private server

It requires alot of work and coding, you should be able to find out on a private server site's forums.

A better way to do this is going to http://www.Google.com and searching "Rsps Custom Items" Use winrar or winzip and extract these files. Extract these files to Models inside of your rsps client... After that look at the files you extracted. The names of these should be numbers. After that look at the number than write it down into the item.java underneath the section you need. (platebody, platelegs, etc...) Which is located inside of your source/server files.

Inside of your class8.java located inside of your client files Search For

public static final Class8 method198(int i)
{
for(int j = 0; j < 10; j++)
{
if(aClass8Array172[j].anInt157 3960)
{
class8.aString170 = "Fancy boots";
class8.aStringArray189 = new String[5];
class8.aStringArray189[1] = "Wear";
class8.aStringArray189[4] = "Destroy";
class8.anInt174 = 12558;//16014;
class8.anInt165 = 12559;//16009;
class8.anInt188 = -1;
class8.anInt202 = 0;
class8.aBoolean176 = false;
class8.anInt198 = 1829;
class8.anInt181 = 784;
class8.anInt155 = 1;
class8.anInt200 = 12560;//16011;
class8.anInt164 = -1;
class8.anInt169 = -2;
class8.anInt204 = 0;
class8.anInt194 = -4;
class8.anInt179 = -1;
class8.anInt190 = 162;
class8.aByteArray178 = "It's a Fancy boots.".getBytes();
}

Copy that and paste it directly above it... Change the stuff above that isn't bolded to your items stuff...

Save and Compile both your Server/Source and your client... Run your server
and client... Log into the game and do command ::pickup (Item Id) 1

If it doesn't work than im feel sorry for you... If you don't have ::pickup command
than your in trouble and i cant help you there....