2- Unzip them.
3- open disk1 folder and double-click on setup.exe and wait for the Oracle Universal Installer to start.*
4- Click on the Next button to continue.

5- On the Specify File Locations page, accept the default Source file location. You can accept the default for the Destination Name and Path field or type in a new name and path as you want, then click Next.

6- Select Complete you can change the product languages and click Next.

7- When the Provide Outgoing Mail Server Information page appears, do not enter any values, then click Next.

8- Check your selections and click Install.

9- Insert the disk2 path when prompted and click OK.
10- When the install has finished click Exit, then click Yes to confirm exiting.
To configure Oracle Developer Suite 10g to connect to the database
11- Go to the Start -> All Programs ->Oracle – DevSuiteHome -> Configuration and Migration tools -> Net Configuration Assistant.

12 - Select Local Net Service Name Configuration and click on Next.
13 - Keep clicking Next until asked for a Service name and enter (XE for Oracle Database 10g Express Edition orcl for Install Oracle Database) Click Next.
14 - Select TCP and click Next. Enter type the domain name or IP address of your database server for the host name (127.0.0.1 for localhost if the database on your PC), leave the port number at 1521 and click Next.
15- You may test the connection.
Note: you can configure Oracle Developer Suite 10g to connect to the database manually by typing it in tnsnames.ora file in the DevSuiteHome
path ..\DevSuiteHome_1\NETWORK\ADMIN\tnsnames.ora and type this (XE as an example)
XE =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
)
(CONNECT_DATA =
(SID = XE)
)
)
16- Congratulation you've got your Developer Suite Installed and ready for use.
* you may have a problem when you click setup.exe saying that checking swap space failed.
to solve it you need to change the maximum size of drive C: to more than 1535.
My Computer right-click Properties -> Advanced - Performance - settings -> Advanced - Change -> Maximum size(change it) - Set - Keep clicking OK.
Restart your PC.
Oracle 10g Developer SuiteOracle 10g Developer Suite Documentation